Wrench.



J. E. MILCOFF.

WRENCH.

APPLICATION FILED 0Ec.1.191a.

LMQQZQO Patented May18,1915.

THE NORRIS PETERS 50., PHOTO-LITHQ. WASHINGTONv D. C.

WTTED TATE PATENT @FFTQE.

JOSEPH E. MILGOFF, OF LEETSDALE, PENNSYLVANIA.

WRENCH.

Application filed December 1, 1913.

To all whom it may concern:

Be it known that I, Josnrrr E. MILoorr, a citizen of the United States, residing at Leetsdale, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Wrenches, of which the following is a specification.

The present invention relates to improve ments in wrenches, the object of the invention being to provide means associated with a jaw which is mounted for slidalole movement upon the toothed shank of a stationary jaw, whereby the said movable aw may be easily and quickly looked upon the shank to properly space the heads of the wrench to engage with nuts or other objects of varying diameters, and the improvement resides in the construction, combination and arrangement of parts set forth in the following specification and falling within the scope of the appended claims.

In the drawings: Figure 1 is a side elevation of a wrench constructed in accordance with the present invention, the movable aw being shown in section and its pawl being brought into engagement with one of the teeth of the shank of the stationary jaw, Fig. 2 is a similar sectional view showing the tooth of the pawl out of engagement with the teeth of the shank to permit of the adjustment of the movable jaw upon the shank, Fig. 3 is a longitudinal sectional view on the line 33 of Fig. 1, and looking toward the arrows, Fig. 4 is a detailed sectional view, illustrating the means for locking the handle of the cam roller to hold the pawl either in looking or unlocking position with relation to the teeth of the stationary jaw. Fig. 5 is a sectional view, similar to Figs. 1 and 2, but illustrating a modified form of pawl. Fig. 6 is a perspective view of the pawl shown in Fig. 5. Fig. 7 is a perspective view of the cam roller.

Referring now to the drawings in detail, 1 designates the head of the stationary jaw and 2 the shank for the jaw 1. The shank is provided upon what may be termed its front face with transversely arranged teeth 3.

The numeral 4 indicates the slidable jaw. This jaw is provided with a bore or passage 5 for the reception of the shank 2, the said passage conforming in shape to the cross sectional contour of the shank 2. The jaw proper is formed with a chamber 6 which opens into the passage 5 at the rear portion of the jaw 4, as is indicated by the numeral Specification of Letters Patent.

Patented May 18, 1915.

Serial No. 803,949.

7 The passage has one of its sides formed wlth an opening which is preferably threaded and which is adapted to receive a threaded closure 8. The closure 8, as well as the opposite side of the chamber 6 has registering rounded openings 9, the same being adapted to provide bearings for a laterally extending shaft 10 provided upon a roller 11. The numeral 12 indicates one form of the pawl. This pawl has its enlarged end or its end opposite its engaging tooth 13, formed with a round opening 14: for the reception of the cam roller 11. It should be here stated that the front wall 14 of the chamber 6 is round, while the back wall 15 is inclined or beveled to the opening 7 and the pawl 13 has its opposite edges curved to its engaging tooth 13. The pawl is provided with a rounded knob or enlargement 1A which normally contacts with the inclined wall 15, a spring 17 being arranged within the casing and exerting a tension upon the pawl below its tooth 13 to swing the pawl and retain its enlargement 14 in such engagement. The shaft 10 which projects through the closure 8 is provided with an angular handle 18 whereby the cam roller 11 is operated, and it will be noted that by actuating the handle to revolve the cam roller 11, the pawl will be forced either toward or away from the teeth 3 of the shank 2 to lock or unlock the slidalole jaw from the shank of the stationary jaw. The arm of the crank handle is arranged a suitable distance away from the side of the movable jaw, and the said arm opposite its juncture with the handle proper is recessed for the reception of a spring pressed pin 19, while one of the sides of the jaw is formed with spaced depressions 20 which are arranged concentrically thereon with relation to the shaft 10, and are thus rotated to receive the pin, when the handle is swung so that the pawl may be sustained in a locked or unlocked position with relation to the shank 2 of the jaw 1.

In Fig. 5 I have shown a slightly modified form of the pawl 12'. In this figure the pawl is substantially similar in construction to that previously described, except that both of the opposite edges of the said pawl are provided with rounded lugs A and B. The lug B bears against the rounded front wall of the chamber while the opposite lug A engages with the angular back wall of said chamber, the lugs A and B resting upon the opposite converging walls of the chamnection with the accompanying drawings, the simplicity of the device as well as the advantages thereof will, it is thought, be

perfectly apparent to those skilled in the art to which such inventionsappertain without further detailed description.

The jaw 14: is provided with an opening which communicates with the chamber 6, The opposite ends vprovided by the opening are preferably inclined toward each, other, as indicated. by th e characters a, and the said opening is of sufficient a size to permit of the. insertion of the pawl within the chamber 6. The opening is normally closed by a cap 6 and which hasits opposite trans verse edgesinclined, as at c, to fit snugly over the inclined transverse edges a, while suitable headed securingelements (Z. pass through suitable openings in the jaw ad -v jacent .the pivoted or inclined edges of the opening thereof, the heads of thesaid elements engaging with the opposite transverse, edges ofthe cap 6,

Having thus described Iclaiin is:

1. A wrench including a stationaryjaw having a toothed shank, a movable jaw upon the shank, a camv roller arranged in an opening in the movablejaw, a shaft. for the cam journaled inbearings inthe jaw, a handle for the shaft, theopposite walls formed. by the opening being flared toward the outer end of the opening and thesaid oute gend communicating withj the teeth of theshank, e a pawl journaled upon thecamroller, said pawl being formed with a knob which normally contacts With one of the walls pro vided. by. the opening and whereby thetoothed or engagingend of the pawlis guided into or out of engagement between Copies of this patent be obtained for five. cents eachlby aii dressiiig 'the Commissioner of Patents,

the inventiomwhat the teeth of the shank when the shaft is rotated toactuate the'cam' roller and pawl.

A wrench including a stationary jaw having a toothed shank, a movable jaw upon the shank, a'pawl carried by the movable In; a ,Wrench the combination.with .a

toothed shank; of a jaw slidably mounted upontheshank, said jaw having a chamber which communicates with the teeth of the shank, the opposite walls of said chamber beinginclined, a cam roller within the chamber, said roller being provided withlaterally extending, shafts which are arranged in bearingsin the said walls of the chamber, a pawl mounted uponthe cam-roller, said pa av ngakn dja e t t g ng face which contacts with one offthewalls' 'of the chamber, a spring upon the second wall contacting with the pawlto force its knob into engagement; with the first mentionedwall of the chamber, a cam handle for-pone, of the lateral shafts, o f the cam roller, a spring :pressed pin within the handle, and spaced openings upon the side of the movable jaw; .to 1 receive the spring pressed pin tohold the crank handle after the same has beenrotated to bring the pawl into or out,of tooth engaging position. v I In testimony whereof I affix my signature in presence of two witnesses, I

JOSEPH E. 'MILCOFF.

Witnesses:

T IIIENLE, H i V RUDoLF CRULAK.

Washington, D. c." 

